Apple

iPhone

iPad

iOS

Jailbreak

Cydia

The iPhone-Dev Team released new OSX versions of pwnage and quickpwn this morning for firmware 2.2.1 compatibility. For 3G users that want to upgrade to 2.2.1 and unlock you MUST use pwnage tool and disable the baseband update to conserve your 2.28.00 baseband. For first generation users there is no baseband update so just restore in iTunes to 2.2.1 and use the new version of Quickpwn to jailbreak.

A new version of Yellowsn0w has been uploaded for 2.2.1 compatibility as well so after you jailbreak add the source: apt9.yellowsn0w.com in Cydia and install version 0.9.7 and then reboot. This versions DOES NOT WORK WITH THE 2.2.1 BASEBAND so if you want to remain unlocked you MUST update with a custom firmware (via Pwnage Tool) that does not include the baseband update.

For 3G users that have upgraded your baseband to 2.30.00 there is no way to unlock or downgrade your baseband so you are stuck until the Dev team can figure out how to crack the new baseband which may not be possible... no one knows yet.

Windows Users: For 3G iPhones you will have to download and use a custom built 2.2.1 firmware with the baseband update disabled.

Oh and if you haven't patched OSX 10.5.6 the devs posted a neat little guide:

As noted previously OS X 10.5.6 introduced a bug that affected the use of DFU mode. with some Macs. There have been previously published hacks and techniques to fix this, but here is another method that can be used to easily restore functionality.

You will need an account with ADC (Apple Developer Connection) this is free and takes a few minutes to sign up, you should read the terms and conditions carefully and you should only sign up if you are thinking of developing applications in the future - Apple Developer Connection - Mac Dev Center